单项选择题

More and more advanced farm machines ______, the agricultural production increased tremendously.

A. using
B. having used
C. having been used
D. to have been used
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单项选择题
Please come to the point, you are ______ the subject again.
A. straying from
B. getting off
C. dwelling in
D. giving up
单项选择题
On knowing that his novel won the Pulitzer Prize, his friends held a big party ______.
A. in his glory
B. in his honor
C. for his glory
D. for his honor
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